SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e772d6a4136b68f9a1d87bc40c05fc29a0b726f6eacef572d14dc295203e3dd' 
  AND token = 'jOcEom4iZKVp+fOYzb+1n1h1034Vg9q5HOlSGRIMvpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}